: The radio is compatible with the official QYT KT-8900 software or the community-standard CHIRP .
Solder a wire from the lug of the plug to the TXD pin on your USB-TTL adapter.
But here’s where 90% of the confusion happens:
| Pin Number | Signal Name | Description | | --- | --- | --- | | 1 | VCC | Power supply (+5V) | | 2 | TXD | Transmit data | | 3 | RXD | Receive data | | 4 | GND | Ground | | 5 | CTS | Clear to send | | 6 | RTS | Request to send |
: Once connected, check your Device Manager to identify the assigned COM port. In the software, ensure you select a port higher than COM2 (often COM3 or above) to avoid communication errors. Recommended Retailers qyt kt8900 programming cable pinout top
If you look at the radio’s front, you’ll see a 6-pin modular jack (RJ-12 style for the mic) and an 8-pin jack.
Whether you're a first-time buyer dealing with a "dead" cable or an experienced ham building a custom interface, this pinout is your roadmap. Bookmark this guide, keep a multimeter handy, and never let a bad cable keep you from loading those repeaters again.
What programming cable works with QYT KT 8900 ... - Facebook
: The programming jack on the back of the KT-8900 is often recessed into the case. Standard bulky 3.5mm plugs may not fit; use a "slim" style connector or a repurposed PC speaker cable for a better fit. Software Setup : The radio is compatible with the official
The programming cable for the QYT KT-8900 3.5mm TRS (stereo) audio jack
The is an incredibly popular, ultra-compact dual-band mobile transceiver prized by amateur radio operators . While it packs massive value, manual programming via the hand mic can be tedious and complex. Utilizing programming software like CHIRP or the official QYT Radio Configuration Tool is the most efficient way to manage your memory channels.
Most programming cables for this radio are comprised of a USB-to-Serial adapter (often using the Prolific PL2303 or FTDI chipset) and a 3.5mm TRRS (Tip-Ring-Ring-Sleeve) or TRS style plug.
You can build a DIY cable using a common USB-to-TTL module (e.g., CP2102 or FTDI) and soldering it to a 3.5 mm jack Ready-made Options: Pre-made cables are available from retailers like Passion Radio Compatibility: For newer operating systems like Windows 11 , it is recommended to use cables with FTDI or CH340 chipsets to avoid driver issues common with older Prolific chips UART adapter to a 3.5 mm jack? In the software, ensure you select a port
A very specific request!
If you own a QYT KT-8900 (or its variants like the KT-8900D or KT-980Plus), you already know the value of this compact dual-band radio. It packs a punch for its size, but programming it via the front panel keypad is an exercise in patience.
For standard programming, only these three connections are used, meaning an ordinary 3.5mm stereo (TRS) plug is often sufficient even if the jack is TRRS. Key Considerations for Setup Rear Data Port: Programming is done through the dedicated "DATA" jack